| OKATECH
Dutch Embassy
| OKATHERM
B4/B6 Headquarters debis AG
| OKASOLAR S
House of Deputies Berlin
| OKALUX+
"Mittelland" sports hall Barleben
| OKATECH
Erasmus University
| OKAWOOD
University of Technology and Economics
| OKALUX K
Institute for Textil - RWTH
| OKATECH, OKATHERM